Refrigeration – Automatic control – By accumulation on freezing surface – e.g. – ice
Patent
1981-06-08
1983-10-18
Wayner, William E.
Refrigeration
Automatic control
By accumulation on freezing surface, e.g., ice
62156, 2502222, F25D 2102
Patent
active
044097956
ABSTRACT:
A demand defrost system is provided for detecting the existence of frost build-up on the surface of the heat exchanger of a cooling system. A light beam is directed through the heat exchanger such that frost build-up blocks the path of the light from reaching a photocell. When the light received by the photocell falls below a selected value, a control signal is produced which discontinues cooling operation of the cooling system and initiates defrost heaters which heat the cooling coils and remove the frost build-up thereon. A temperature sensing switch is also provided which reinitiates the cooling cycle after a temperature indicates that frost has been removed from the cooling coils.
REFERENCES:
patent: 2377926 (1945-06-01), Dreier
patent: 3120108 (1964-02-01), Pansing
patent: 3961495 (1976-06-01), Beauvent et al.
Russell Coil Company
Wayner William E.
LandOfFree
Demand defrost system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Demand defrost system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Demand defrost system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1283526